Having checked IX after my last response, I'm not sure the reason for the question... Field does NOT work from the PQR but rather the WPS. If the PQR is being reviewed for validation of the WPS (QA type function) my response would be the time between root and hot pass is not an ASME requirement but may be important to the Engineer for many reasons.
By simply recording 5 minutes time between root and hot pass on the PQR doesn't mandate that the information be included on the WPS, which is what the field hands need to be working to.
jon,
My understanding of the question is the idea of the transition from the PQR to WPS, and whether or not something on the PQR has to be written into the WPS. And the answer is no. Or, only if it is a codified variable.
But you are right, if it is on the WPS it has to be followed no matter what level, or lack thereof, of variable it is.